X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=grading%2Flib%2FPintos%2FGrading.pm;h=3ebeb223b6a7ee53f5b7c6f11e943c2010075156;hb=9c6a7a85c6e3ecf2e01475e4bd47347e5b3039c2;hp=aca287d5503e6a5f1911803768cd3908d54c2426;hpb=a82e6fa3ef7f96e7b4cf885e790f3b545218c846;p=pintos-anon

diff --git a/grading/lib/Pintos/Grading.pm b/grading/lib/Pintos/Grading.pm
index aca287d..3ebeb22 100644
--- a/grading/lib/Pintos/Grading.pm
+++ b/grading/lib/Pintos/Grading.pm
@@ -87,11 +87,12 @@ EOF
 # applies any patches providing in the grading directory,
 # and installs a default pintos/src/constants.h
 sub extract_sources {
-    # Nothing to do if we already have a source tree.
-    return if -d "pintos";
-
+    # Make sure the output dir exists.
     -d ("output") || mkdir ("output") or die "output: mkdir: $!\n";
 
+    # Nothing else to do if we already have a source tree.
+    return if -d "pintos";
+
     my ($tarball) = choose_tarball ();
 
     # Extract sources.